For over a year, chef Jason Bond has been accumulating one of the city's most impressive rare beer collections. Now he's offering it to the public.

Bondir Concord might be better known for chef Jason Bond’s heartfelt presentations and its allegiance to local farms. But like Bond’s new holistic gardening venture¬†at Sweet Autumn Farm in Carlisle, or his foray into quirky, Calagione-esque craft brewing creations, Bondir Concord might have another whimsical draw. For over a year, Bond has been attending rare beer auctions at¬†Skinner Auctioneers in Boston’s Back Back, accumulating a cache of some of the world’s most envy-inducing¬†bottles. This week, the chef unveiled his first ever reserve beer list in Concord, with showpieces like a 2001 Cantillon Grand Cru, a 2005¬†Drie Fonteinen Oude Kriek lambic, and¬†even, Bond’s own black truffle porter.

“People around Boston have these seriously deep beer cellars,” Bond says. “They get into beer for a while and spend a lot of money and then get into something else and eventually¬†sell off some of their collection. That’s why Skinner is holding these auction more often now.¬†We’ll go to the Skinner auctions a few times a year and keep adding to this list. Some things might just be an¬†individual bottle, while others we’ll be buying in bigger lots. But these are things you’ll never be able to buy¬†from a distributor. These are fun, exciting things you can’t really find anywhere else.”

Bond treats his growing collection like expensive Champagne or Bordeaux, storing it in a temperature controlled, humidity-free cellar than never rises above 60 degrees. Bondir’s offerings also lean heavier on Belgian producers with a reputation for complexity and age-worthiness. And that’s a good thing, considering prices on these bottles range anywhere from $25 to several hundred dollars a piece.

“There’s enough history behind aged Belgian ales where you know what you’re going to get, for the most part,” Bond says. “The American brewers are younger, so there’s less predictability. Some we’ve tasted before and we trust like Lost Abbey, Stone, and Ommegang. But even though these beers can be very expensive, there are a lot of knowledgeable beer fans out there who understand what’s behind it and how rare these offerings are. My whole goal for this is for my guests to come in and experience something unique.”

Brouwerij De Molen Rasputin – 2008 (750ml) $60Pours black with a tan-to-brown head that lingers. Cola-sweet, rum, molasses, lightly cocoa, lots of brown sugar. A little thin on the tongue after the initial thickness, coats only lightly.